No answer, no feedback, misleading contract

I have been on a contract with MTN for 5 months, and they have INCREASED my monthly contract fee, surely this is not acceptable as I signed a 24month contract for that amount.<br> I have been trying to contact the Eastgate branch for more than a week. I once got through to Isaac who sold me the contract, and simply requested to be sent my contract, he said he would get back to me, which he did not, and ever since there has been no answer at the store.<br> It seems now that my sms bundle and data bundle that came with the contract was actually a once off amount, and not monthly like a contract should be, this is really frustrating.<br> I tried phoning the customer care center which forever has a high call volume (no surprise there) and then the line eventually just gets cut off.<br> VERY ANNOYED